Comment 1 for bug 1907144

When two metals have different block devices that cannot be mapped to the same /dev/disk/..., it looks like the charm will allow you to do this

juju config nova-compute ephemeral-device=/path/number/1
juju add-unit nova-compute --to <machines-with /path/number/1 but NOT /path/number/2>
...wait...
juju config nova-compute ephemeral-device=/path/number/2
juju add-unit nova-compute --to <machines-with /path/number/2 but NOT /path/number/1>
...wait more...

It seems the code would set up both correctly. Is this a dangerous workaround?